Marcelo joins Morgan Freeman on the Science Channel to discuss the limits of humanity's potential.

Marcelo speaks with guest host Helen Mann about the controversial multiverse theory—where our universe is just one of many—and how, despite advancements in science, we have to realize how much we still don't know.

Marcelo gives a talk on "The Origin of Life" at TEDX East.

The more we learn, the more it pushes the boundaries of what we don't know. Marcelo Gleiser, professor of physics and astronomy at Dartmouth, describes this problem by using the metaphor of an island. Knowledge is an island. As this island grows, Gleiser says, the border of what we do not know also grows. So the history of knowledge will always be incomplete.